Posture seat



FIG. 1 is a top perspective view of a posture seat showing the new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Surface shading is used to shade FIGS. 1-8 to show clearly the character and contour of all surfaces of the 3-dimensional aspects of the design and form a part of the design sought to be protected. 

CLAIM The ornamental design for a posture seat, as shown and described. 